nn.copy does not perform a copy

[dcuny]

In line 579 of NeuralLua.lua, the nn.copy function is defined as:

function nn.copy(neural)
  local new_neural = neural
  return new_neural
end

However, this doesn't perform a copy of the table, it just returns a reference to the same table.

Might you have intended a function like this? (see here for source):

-- Perform deep copy
local function deepcopy(orig)
    local orig_type = type(orig)
    local copy
    if orig_type == 'table' then
        copy = {}
        for orig_key, orig_value in next, orig, nil do
            copy[deepcopy(orig_key)] = deepcopy(orig_value)
        end
        setmetatable(copy, deepcopy(getmetatable(orig)))
    else -- number, string, boolean, etc
        copy = orig
    end
    return copy
end

-- create a deep copy of a neural network object
function nn.copy( neural )
  return deepcopy( neural )
end